I have the cu-cld067 remote.
I checked with a cell phone camera and each button is showing an active light when pressed yet the unit will not respond to the remote. I have a second laserdisc player which does respond to play, stop, scan and skip (so again I know that the remote works) although eject does not work when using the remote with this second laserdisc player.

Regarding the M90, what might be the reason it is not responding to the remote? I did check and there is nothig plugged into the remote out port